Tohoku Region

a)On 2 May, there were two M4.8 events in the same location in which an M5 class event occurred on 26 April, within the aftershock region of the 1994 M7.5 earthquake off the Haruka coast. Additionally, on 24 May there was an M4.5 event 150 km to the north-northeast (the site of the strongest aftershocks of the offshore Tokachi earthquake of 1968).

Note: Within square brackets ([ ]) is the epicenter place name used by the Meteorological Agency in its information releases.

Note:
M=magnitude
N: total number of events in the figure
depth=depth of hypocenter
UND=Earthquakes of less than M1.0 and earthquakes whose magnitude was not recorded.
The key to the symbols shows on the left the size of an earthquake and on the right the depth of the hypocenter.

Japan Meteorological Agency,Science and Technology Agency